Summit Leadership

Leading the NAIIS

TAN-Headshot-June-2013-Color-smlL.J TAN, MS, PhD

Dr. L.J Tan is the Chief Strategy Officer for the Immunization Action Coalition, which he joined in January 2013. There, L.J is leading the IAC’s new strategic direction on national immunization advocacy and policy development. Prior to that, L.J was the Director of Medicine and Public Health at the American Medical Association (AMA) for 15 years, where he led multiple AMA efforts in immunizations and infectious diseases, prevention and health promotion, aging and community health, and eliminating healthcare disparities and improving the health of physicians.

Dr. Tan received his PhD in Immunology/Microbiology from Northwestern University Medical School, and completed a postdoctoral fellowship in Molecular Immunology at the University of Chicago Hospitals.

Dr. Tan was recently elected onto the National Quality Forum’s Adult Immunizations Expert Committee, onto the European Society of Clinical Microbiology and Infectious Diseases Vaccine Study Group (EVASG), and serves as an editor for BMC Infectious Diseases.

He just completed his term as an elected member of the federal National Vaccine Advisory Committee (NVAC). He still serves on the NVAC’s HPV, Vaccine Confidence, and Maternal Immunization working groups. Previously, L.J chaired the Immunization Infrastructure Working Group and also served on the vaccine safety Workgin.

Dr. Tan has also served as a member of the federal Advisory Committee for Immunization Practices (ACIP), and he still serves on the Adult Immunization working group. Previously, L.J also served on the influenza, zoster, and evidence-based working groups.

Dr. Tan co-founded (with the CDC and the NVPO) and currently co-chairs the National Adult and Influenza Immunization Summit, and founded and organized the first National Immunization Congress in 2007, and organized the Second National Immunization Congress in 2010. He served as a primary consultant for the first European Union Influenza Summit in 2011, and the first Asian Pacific Influenza Summit in 2012, and continues to advise those bodies.

He serves or has served on the Steering Committees for the 317 Coalition, the National Network for Immunization Information (NNii), the Partnership to End Cervical Cancer, the National Viral Hepatitis Roundtable, and the Scientific Advisory Boards for the Immunization Action Coalition and Coalition for Safe Community Needle Disposal.

L.J is a member of numerous professional organizations including the American Public Health Association, the Federation of American Societies for Experimental Biology, the American Society of Microbiology, the American Association of Immunologists, the National Council of Asian & Pacific Islander Physicians, and the Infectious Diseases Society of America.

Ram Koppaka, MD, PhDRAM KOPPAKA, MD, PhD

Ram Koppaka, MD, PhD is the Associate Director for Adult Immunization in the CDC Immunization Services Division. From 2016-17, he served as the HHS Regional Health Administrator for Region IX, based in San Francisco. He was previously a senior medical officer with the Centers for Disease Control and Prevention and had been assigned to the NYC Department of Health and Mental Hygiene (DOHMH) from 2007-2016. During his tenure in NYC, he served as Director of the Provider Education Program In addition, he served in a number of acting capacities, including as Assistant Commissioner for the Bureau of Vital Statistics and Deputy Commissioner for Epidemiology. During 2006, he was assigned to the United Nations System Influenza Coordination Team charged with preparing the UN System for pandemic influenza. From 2003-6, he was the Associate Director for Policy for the CDC, Division of Global Migration and Quarantine. From 1998-2003, he was assigned by CDC to the Commonwealth of Virginia, Division of Tuberculosis Control where served as Director.

Dr. Koppaka was born in Montclair, NJ and grew up in Gainesville, Florida. He earned his BS in microbiology (High Honors), MD (High Honors), and PhD in Medical Sciences all from the University of Florida. He served his residency in Internal Medicine and fellowship in Pulmonary and Critical Care Medicine at Washington University in St. Louis. He is licensed to practice medicine in the Commonwealth of Virginia and States of Georgia and New York and is Board Certified in Internal Medicine and Pulmonary Medicine. He is a Captain in the US Public Health Service.


David Kim, MD, MA, has been the Director of the Division of Vaccines in the Office of Infectious Disease and HIV/AIDS Policy (OIDP, which includes the former National Vaccine Program Office [NVPO]), Office of the Assistant Secretary for Health, Department of Health and Human Services, since 2019.

From 2014–2019, he was the Deputy Associate Director for Adult Immunization with the Immunization Services Division at the Centers for Disease Control and Prevention (CDC). Dr. Kim joined CDC as an Epidemic Intelligence Service officer with the Respiratory and Enteric Viruses Branch and cut his teeth on public health with measles, rubella, hepatitis B, and other infectious disease outbreak investigations and early work to evaluate an association between rotavirus vaccine and intussusception.

During his tenure at CDC, Dr. Kim led HIV drug resistance surveillance and molecular epidemiology activities, bridged emergency management and public health preparedness and response as a CDC assignee to the state of Georgia, led quarantine program operations at U.S. ports of entry, and helped lead refugee and immigrant health programs. Dr. Kim was deployed on a number of natural disaster, humanitarian, and disease outbreak responses and served as the deputy commander of the Applied Public Health Team 3, U.S. Public Health Service. He maintains a clinical practice at the Ryan White HIV Care Clinic, DeKalb County Board of Health, Georgia Department of Public Health, and previously was a clinician at the health department’s Refugee Health Clinic and Center for Torture and Trauma Survivors, as well as the Atlanta Asylum Network.

Dr. Kim serves on the Vaccine and Related Biological Products Advisory Committee at the Food and Drug Administration, CDC’s Advisory Committee on Immunization Practices, the Advisory Commission on Childhood Vaccines at the Health Resources and Services Administration, and the American Academy of Pediatrics Committee on Infectious Diseases. He earned his BA and MA from Colorado College and MD from the University of Colorado School of Medicine, and he completed internal medicine training at the University of Rochester, Rochester, NY.